246 OCTANDRIA DIGYNIA 



wider than long, green and smooth above, paler and pubescent beneath, the nervei 

 and axils hirsute (quite villose beneath when young), truncate and a little cordate 

 at base, sometimes rather auriculate; lobes palmately diverging, coarsely and 

 sparingly sinuate-toothed, abruptly narrowed to a slender acumination ; petioles l 2 

 lo 4 inches long. Flowers pale greenish yellow, pendulous on fasciculate Aliform 

 villose pedicels an inch or more in length. Calyx 6ubcampanulate, truncate, the 

 limb coarsely crenate, or rcpand-toothed, fringed with long hairs. Petals 0. Sta- 

 mens exserted. Ovary hirsute, compressed, 2-horncd with the young wings of 

 the fruit; style nearly as long as the ovary ; stigmas filiform, pubescent. Fruit 

 turgid, ovoid, smooth ; the wings about an inch long, nearly parallel, or slightly 

 diverging, dilated towards the extremity, and often rounded at apex. 



llab. Rich woodlands, along Brandy wine: rare. Ft. April— May. Fr. Sept. 



Obs. This handsome tree,— so valuable to the settlers in the interior, for the co- 

 pious supply of Sugar which it yields,— is not common in Chester County ; but it 

 occurs frequently near the forks of Brandy wine. The beautiful wood, used by 

 Cabinet-makers under the name of BirtVs-Eye Maple, is. I believe, afforded by 

 this species,— as also some of the varieties of Curled Maple. 



4. A. Negtjndo, L. Leaves ternatc, or pinnate by fives ; leaflets rhom- 

 boid-oval, or oval-lanceolate, acuminate, unequally and coarsely incised- 

 dentate ; flowers dioicous, in simple pendulous racemes. Torr. FL 1 . 

 p. 398. Icon, JMx.f. Sylva. I. tab. 46. 



Negundo fraxinifolium. JYutt. Gen. 1. p. 253. DC. Pvodv. \. p. 

 596. Hook. Am. I. p. 1 14. Beck, Bot. p. 64, 

 Negundium americanum. Lindl. Ency. p. 864. 

 Vulgo — Ash-leaved Maple. Box Elder. 



Stem 15 to 20 or 30 feet high, branching ; branches rather erect, with a smooth- 

 ish yellowish green bark. Leaves mostly trifoliate, sometimes odd-pinnate by 

 fives, on a common petiole 3 or 4 inches long; leaflets 3 to 5 inches long, and I 

 to 3 inches wide, varying from lanceolate to lance-ovate, the terminal odd one 

 somewhat rhomboid-oval, all conspicuously acuminate, coarsely inciscd-dentate 

 above the middle, mostly entire near the base, on short petioles. Flowers yellow- 

 ish green, pendulous. Staminate Jlotccrs mostly pentandrous, on very slender 

 slightly pubescent pedicels I to 2 inches long. Pistillate flotcers in simple pendu- 

 lous racemes ; pedicels opposite, about half an inch long; ovary hirsute; stigma* 

 linear, diverging, subsessilc. Frtiit oblong, pubescent, the wings about an inch 

 long, diverging, dilated towards the extremity, with the outer margin rounded, 

 or incurved at apex. 



Hab. Wet low grounds, along Brandy wine : not common. FL April. Fr. Sept. 



Obe. This differs considerably, in habit, from the preceding species, and has 

 been separated from them, by several modern Botanists; but it seems to be so es- 

 sentially an Acer, In its fruit, that I incline to continue it with the genus. Five or 

 six additional species are enumerated in the U. States. 



[Trientalis americana. Heptandria Monogynia.] 

 [Monotropa lanuginosa. Decandria Monogynia.} 



Order 2. Digynia. 



[Ulmus americana. Pentandria Digynia.] 

 LCkrysosplenium americanum, Decandria Digynia.] 





